ADD: logout on global logout (closes #784)

src/components/Navbar.vue

@@ -184,6 +184,7 @@ export default {
       }
     },
     async global_logout() {
+      await this.$store.dispatch('doLogout')
       window.location.href = 'https://idp.scc.kit.edu/idp/profile/Logout'
     }
   },